amdgpu_vm_sdma_update(9)

📦 version 7.3.1, in nixpkgs unstable

✨ amdgpu_vm_sdma_update 💅

okay so bestie, welcome to the amdgpu_vm_sdma_update(9) page — this is from the Kernel API Manual, and it's genuinely iconic because it's the little function that actually executes the VM update 🌸 like, the moment everything finally happens.

✨ NAME ✨

amdgpu_vm_sdma_update — execute VM update 🫶

✨ SYNOPSIS ✨

int amdgpu_vm_sdma_update (struct amdgpu_vm_update_params *p , struct
amdgpu_bo_vm *vmbo , uint64_t pe , uint64_t addr , unsigned count ,
uint32_t incr , uint64_t flags );

✨ ARGUMENTS ✨

  • p — the params, bestie 💖 just go see the amdgpu_vm_update_params definition, it's all in there.
  • vmbo — the PD/PT that's getting updated. main character of this whole operation ngl 🎀
  • pe — byte offset of the PDE/PTE, relative to the start of the PDB/PTB. yes, byte offset, not a vibe offset 😭
  • addr — the dst addr you're writing into pe 💫
  • count — how many page entries we're updating. could be one, could be a whole little squad ✨
  • incr — increase the next addr by incr bytes 🔥 that's the step size fr fr
  • flags — the hw access flags 🧚

✨ DESCRIPTION ✨

so what does it actually do, you ask? it reserves space in the IB, sets up the mapping buffer on demand, and writes the commands to the IB 💅 like yes queen, do it all.

that's the whole vibe: reserve, setup on demand, write commands. periodt.

✨ SEE ALSO ✨

the kernel file lives at ./drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c — go read it, it's giving lore 📖

ngl bestie, read the whole little family of amdgpu_vm_sdma_* functions together — they literally slay as a set 🌈

okay that's the page!! 🦋 this one comes from the ./drivers/gpu/drm/amd/amdgpu source, and it's dated October 2026 — so like, future iconic 💜 mwah, go update those page tables, iykyk 💅✨

📦 where this page comes from